Refrigerating machine



NOV. 27, 1934. DRYSDALE 1,981,848

REFRIGERATING MACHINE Filed Aug. 4, 1932 i I I 1 a 1 z 1 I 5 I Patented Nov. 27, 1934 UNITED STATES 1,981,848 RIEFRIGERATING MACHINE William D. Drysdale, Buffalo, N. Y., assignor to Walter J. Sugden, West Roxbury, Mass.

Application August 4, 1932, Serial No. 627,417

13 Claims.

This invention relates to refrigerating machines, and is more particularly concerned with the mounting of a motor-driven compressor umt. The invention aims to provide simple, compact,

- inexpensive and effective means resiliently to support the unit when in service, thereby to absorb vibration, and consequently to reduce or to eliminate noise, and, on the other hand, to support the unit rigidly when prepared for shipment.

1 The invention will best be understood by referv ence to the following description when taken in connection with the accompanying drawing of one specific embodiment thereof, while its scope will be pointed out more particularly in the appended claims.

In the drawing:

Fig. 1 is a plan of a unit having a mounting embodying the invention;

Fig. 2 is an end elevation of the same;

Fig. 3 is a side elevation, partly in vertical section, on line 3-3 of Fig. 1;

Fig. 4 is a sectional view, on an enlarged scale, on line 44 of Fig. 1, showing the mounting rigidly arranged for shipment; and

Fig. 5 is a sectional view, similar to Fig. 4, showing the mounting arranged for the resilient support of the unit when in service.

Referring to the drawing, and-to the embodiment of the invention illustrated therein, there is shown a motor-driven compressor unit comprising a compressor 10, and an electric motor 11 enclosed in a housing 12. Beneath the unit is a platform or cradle 13, having a depressed portion 14, which receives the unit, and elevated portions 15 extending laterally from the depressed portion, therebeing four in the present example, ar-

ranged in pairs. The depressed or downwardly offset portion enables the over-all height to be reduced. The compactness of'the assembly is of considerable importance, especially in shipment, because it is desirable to ship this part of the refrigerator as a package separately from the cabinet, and by reducing its size, the number which can be shipped in a freight car is increased.

Moreover, reduction of the dimensions of the'unit and its mounting enables the unit to be installed in a smaller space in the cabinet. As herein shown, the unit is conveniently secured to the platform or cradle as by providing the housing 12 with integrally cast lugs 16, to receive cap-screws 17 extending through obliquely extending portions 18 of the depressed portion 14. I

- Beneath the platform or cradle is a base, herein a flat plate 19, which in practice is suitably supported in the refrigerator cabinet. Suitable supports 20, herein tubular and upstanding from the base, are appropriately secured to the latter, as

by Welding. Within these supports are cushioning and vibration-dampening disks 21 of suitable material, such as rubber, and resting upon these disks are helically coiled springs 22, which are centered by downwardly directed spring-centering projections 23, conveniently formed on the elevated portions 15 of the platform or cradle, as by punching the metal to form a plurality of tongues, which are bent downwardly.

When the machine is in service, the springs are extended as shown in Fig. 5, and support the elevated portions 15 of the platform or cradle, above and. out of contact with the upper ends of the supports 20. The springs and the cushioning disks absorb vibrations set up by the motor-driven compressor, and prevent the same from being transmitted to the base 19 and to the refrigerator cabinet by which the latter is supported. By this means, the described resilient mounting deadens the sound.

When the unit is to be transported, it is prepared for shipment by inserting cap-screws 24 through vertically aligned apertures 25 and 26, in the parts 15 and 21, and, by screwing the screws into threaded openings 2'? in the plate 19, the parts 15 may be brought down onto the upper ends of the supports 20, in opposition to the upward thrust of the springs, and the projections 23 enter the supports 20, thus preventing horizontal movement of the platform, and providing an absolutely rigid and perfectly safe mounting for shipment. When the unit is to be placed in service, the cap-screws 24 are removed, thus converting the mounting into one of resilient character, as shown in Fig. 5. It might of course be possible to leave the capscrews 24 in place after they are unscrewed, but their removal is preferred because, if they remain in place, they are likely to produce noise.

Having thus described one embodiment of the invention, but without limiting myself thereto, what I claim and desire by Letters Patent to secure is:

1. In a refrigerating machine, the combination of a motor-driven compressor unit, a cradle beneath said unit and having a depressed portion which receives said unit, and elevated portions extending laterally from said depressed portion, said elevated portions being provided with apertures and with downwardly directed spring-centering projections about said apertures, a base beneath said cradle and provided with aperturesvertically aligned with the apertures of said elevated portions, tubular supports secured to and upstanding from said base in vertical alignment with said apertures, cushioning disks within said supports and resting upon said base, said disks being provided with apertures vertically aligned with the first and second mentioned apertures, helicallycoiled springs resting upon said disks and normally supporting said elevated portions above the upper ends of said tubular supports, the upperends Of said springs being centered by said projections, and screws extending through said aligned apertures and adapted to retain said elevated portions upon the upper ends of said supports.

2. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, and means to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said springs.

3. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, cushions within said supports and interposed between said springs and said base, and means to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said springs.

4. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, projections directed downwardly from said platform into said supports, and means to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said springs.

5. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, and threaded members extending through said tubular supports to clamp said platform downwardly upon the upper ends of said supports.

6. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, and threaded members extending through said platform, through said tubular supports and into said base to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said springs.

'1. In a mounting for a refrigerating unit, the combination of a platform to support the unit, a base below said platform, tubular supports Secured to and directed upwardly from said base, springs within said supports, interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, cushions within said supports and interposed between said springs and said base, and threaded members extending through said tubular supports, through said springs, and. into said base to clamp said platform downwardly upon the upper ends of said supports.

8. In a convertible mounting for a refrigerating unit, the combination of a horizontally extended platform to support the unit, a horizontally extended base below said platform, tubular supports immovably secured to and directed upwardly 90 from said base, resilient means interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, and means extending through said tubular supports to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said resilient means, said means being accessible for'operationwithout removing said fixed platform.

9. In a convertible mounting for a refrigerating 100 unit, the combination of a horizontally extended platform to support the unit, said platform being provided with downwardly directed projections, a horizontally extended base below said platform, tubular supports immovably secured to and directed upwardly from said base and adapted to receive said downwardly directed projections, resilient means interposed between said base and said platform and normally elevating the latter above the upper ends of said supports, and means extending through said tubular supports to clamp said platform downwardly upon the upper ends of said supports in opposition to the upward thrust of said resilient means, said means being accessible for operation without removing said fixed platform.

10. In a convertible mounting for a refrigerating unit, the combination of a platform having a depressed portion to receive said unit and elevated portions extending laterally from said depressed portion, a base beneath said platform, hollow supports interposed between said base and said elevated portions, resilient means within said supports and interposed between said base and said elevated portions, and means extending within said supports to urge said platform downwardly and to utilize said supports to support said platform rigidly with relation to said base.

11. In a mounting for a refrigerator unit, the combination of a platform member to support the unit, a base member below said platform, supports fixedly carried by one of said members and projecting toward the other, resilient means within said supports, interposed between said members and normally maintaining said supports spaced from one of said members, and means to overcome said springs and to clamp the last-mentioned member and said supports together to hold said platform rigid.

12. In a mounting for a refrigerator unit, the combination of a platform member to support the unit, a base member below said platform, supports fixedly carried by one of said members and projecting toward the other, resilient means within said supports, interposed between said members and normally maintaining said supports spaced from one of said members, and means to overcome said springs and to clamp the last-mentioned member and said supports together to hold said platform rigid, the last-mentioned means comprising threaded members extending loosely through said platform member and into said base member.

13. In a mounting for a refrigerator unit, the combination of a platform member to support the unit, a base member below said platform, supports fixedly carried by one of said members and projecting toward the other, resilient means within said supports, interposed between said 

